I've been experimenting with "-flto" to compile various source packages. Using binutils-2.23.1 and gcc-4.7.2, both compiled with "--enable-lto" and CC="gcc -flto -fuse-linker-plugin -march=i486 -mtune=i686 -Os -pipe" CXX="g++ -flto -fuse-linker-plugin -march=i486 -mtune=i686 -Os -pipe -fno-exceptions -fno-rtti" ./configure --yada-yada glibc-2.17 ./configure fails complaining that ld does not support array something or other (removing "-flto -fuse-linker-plugin" fixes this). apps are generally 0-20% smaller than without "-flto -fuse-linker-plugin" dynamic libs are generally 0-20% smaller than without "-flto -fuse-linker-plugin" static libs are generally much larger than without "-flto -fuse-linker-plugin" (a few 100kb without lto to several mb with lto) 1. Am I using "-flto" correctly? 2. I'm removing "-O2" from the Makefiles - do I need to remove "-g" as well? John
